The service schedule for my 2010 CX-7 says every 4 months or 5k miles and calls for 5w30 oil. While it doesn’t specify synthetic, I use it anyways due to the turbo charger the factory put on it- it also recommends premium but doesn’t require it, yet I have not put one tank of 87 octane in it the 8 years I’ve owned it. It holds 6 quarts of oi, so I get charged extra for more oil when the shop changes it.
The 2018 Mustang I just bought says to let the maintenance monitor let you know when to change the oil, or once a year, whichever happens first. It specifies I use 5w20 full synthetic, so that’s what it’ll get. It also recommends premium, but does not require it, which is odd since it’s a performance engine- I paid for 460hp, I’m using the good stuff to get it. I’m not really looking forward to having to pay for the oil changes since the manual says it holds 10 quarts of oil, but again, I paid for the power, no use crying over burnt rubber.